211321312 has 12 divisors (see below), whose sum is σ = 416038896. Its totient is φ = 105660640.

The previous prime is 211321291. The next prime is 211321321. The reversal of 211321312 is 213123112.

211321312 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3301864 + ... + 3301927.

It is an arithmetic number, because the mean of its divisors is an integer number (34669908).

Almost surely, 2^211321312 is an apocalyptic number.

It is an amenable number.

211321312 is a deficient number, since it is larger than the sum of its proper divisors (204717584).

211321312 is an equidigital number, since it uses as much as digits as its factorization.

211321312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6603801 (or 6603793 counting only the distinct ones).

The product of its digits is 72, while the sum is 16.

The square root of 211321312 is about 14536.8948541289. The cubic root of 211321312 is about 595.6362208090.

Adding to 211321312 its reverse (213123112), we get a palindrome (424444424).

The spelling of 211321312 in words is "two hundred eleven million, three hundred twenty-one thousand, three hundred twelve".